JP6320113B2 - Valve and radioactive waste solidification device - Google Patents

Description

  The present invention relates to a valve and a radioactive waste solidifying device.

  The low-level radioactive waste generated in the nuclear power plant is disposed of through a series of processes including volume reduction and solidification. Known solidification methods include a cement solidification method using cement as the solidification material, an asphalt solidification method using asphalt as the solidification material, and a plastic solidification method using plastic as the solidification material.

  In the cement solidification method, a solidified body in which radioactive waste is solidified with cement is manufactured. As a method for producing a solidified body, an in-drum mixing method, an out-drum mixing method, a vacuum injection method, and the like are known. The in-drum mixing method is a method in which a stirrer is inserted into a disposal container such as a drum can, and radioactive waste, cement, and water are stirred and solidified inside the disposal container. The outdrum mixing method is a method in which radioactive waste, cement, and water are kneaded in a kneader different from the disposal container, and the kneaded material is filled in the disposal container and solidified. The vacuum injection method is a radioactive radioactive waste that is filled with a solidified material containing cement and vermiculite in a sealed disposal container and then evacuated to reduce the pressure inside the disposal container. Is impregnated into a solidifying material and solidified.

  In the in-drum mixing method, radioactive waste is supplied to a disposal container through a supply passage provided with a valve. Patent Document 1 discloses an example of a technique related to a valve applied to a powdery material distribution portion in a solidification apparatus that processes radioactive waste.

Japanese Patent Laid-Open No. 62-188864

  If radioactive waste remains in the valve, the valve may not operate smoothly. For example, if the remaining radioactive waste sticks to the valve and the valve becomes inoperable, the radioactive waste may not be supplied to the disposal container. As a result, the solidification process may not be performed.

  An object of an aspect of the present invention is to provide a valve that can realize a smooth operation. Moreover, the aspect of this invention aims at providing the radioactive waste solidification apparatus which can implement a solidification process smoothly.

  A first aspect of the present invention includes a cylindrical portion disposed around a central axis, an inlet connected to an opening at a lower end portion of a supply passage provided in a part of the cylindrical portion and through which radioactive waste passes, A casing having an outlet provided at a lower end portion of the cylindrical portion, a valve body disposed inside the casing, and a first outer side of one end portion of the inlet with respect to a direction parallel to the central axis. The valve body is movable between one position and a second position outside the other end of the inlet, and the outer surface of the valve body and the inner surface of the casing are in contact with each other at the first position. The outlet is closed by the valve body, and when moving from the first position to the second position, the outer surface of the valve body is separated from a predetermined region of the inner surface of the casing below the inlet, The outer surface of the valve body in movement from the second position to the first position Providing a valve comprising a moving device for moving the valve body such that the predetermined area of the inner surface of the casing contacts.

  According to a second aspect of the present invention, there is provided a first supply passage having a first supply passage through which radioactive waste supplied to a disposal container passes, a first opening provided at a lower end portion of the first supply passage, and the disposal. A second supply passage through which a solidification material supplied to the container passes, a second supply pipe having a second opening provided at a lower end of the second supply passage, and a third supply through which water supplied to the disposal container passes. A third supply pipe having a third opening provided at a lower end of the passage and the third supply passage, a stirrer for stirring the radioactive waste, the solidified material, and the water supplied to the disposal container; A radioactive waste solidification apparatus comprising: a valve according to a first aspect connected to the first opening.

  According to the aspect of the present invention, a valve capable of realizing smooth operation is provided. Moreover, according to the aspect of this invention, the radioactive waste solidification apparatus which can implement a solidification process smoothly is provided.

FIG. 1 is a schematic configuration diagram illustrating an example of a radioactive waste solidification apparatus according to the first embodiment. FIG. 2 is a cross-sectional view showing a part of the radioactive waste solidifying apparatus according to the first embodiment. FIG. 3 is a diagram schematically illustrating an example of the operation of the valve according to the first embodiment. FIG. 4 is a diagram schematically illustrating an example of the operation of the valve according to the first embodiment. FIG. 5 is a diagram schematically illustrating an example of the operation of the valve according to the first embodiment. FIG. 6 is a diagram schematically illustrating an example of the operation of the valve according to the first embodiment. FIG. 7 is a diagram illustrating an example of the moving device according to the first embodiment. FIG. 8 is a diagram schematically illustrating an example of the operation of the valve according to the first embodiment. FIG. 9 is a diagram schematically illustrating an example of the operation of the valve according to the first embodiment. FIG. 10 is a diagram schematically illustrating an example of the operation of the valve according to the first embodiment. FIG. 11 is a diagram schematically illustrating an example of the operation of the valve according to the second embodiment. FIG. 12 is a diagram schematically illustrating an example of the operation of the valve according to the second embodiment. FIG. 13 is a diagram schematically illustrating an example of the operation of the valve according to the second embodiment. FIG. 14 is a diagram schematically illustrating an example of the operation of the valve according to the second embodiment.

  Hereinafter, embodiments according to the present invention will be described with reference to the drawings, but the present invention is not limited thereto. The components of each embodiment described below can be combined as appropriate. Some components may not be used. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same.

  In the following description, an XYZ orthogonal coordinate system is set, and the positional relationship of each part will be described with reference to this XYZ orthogonal coordinate system. One direction in the horizontal plane is defined as the X-axis direction, a direction orthogonal to the X-axis direction in the horizontal plane is defined as the Y-axis direction, and a direction (vertical direction) orthogonal to each of the X-axis direction and Y-axis direction is defined as the Z-axis direction.

<First Embodiment>
A first embodiment will be described. FIG. 1 is a schematic configuration diagram illustrating an example of a radioactive waste solidifying apparatus SE according to the present embodiment. The radioactive waste solidification device SE solidifies (solidifies) the radioactive waste RW generated in the nuclear power plant using the solidification material SM. The nuclear power plant nuclear reactor includes at least one of a pressurized water reactor (PWR) and a boiling water reactor (BWR).

  As shown in FIG. 1, the radioactive waste solidification device SE includes a first supply device 1 that supplies the radioactive waste RW to the disposal container DC such as a drum, and a second supply that supplies the solidification material SM to the disposal container DC. The device 2, the third supply device 3 for supplying the water WT to the disposal container DC, the exhaust device 4 for discharging the gas GA of the disposal container DC, the radioactive waste RW and the solidification material SM supplied to the disposal container DC A stirrer 5 that stirs the water WT, a transport device 6 that transports the disposal container DC, and a cleaning device 7 that cleans the stirrer 5 are provided. The radioactive waste solidifying device SE is accommodated in the chamber device CH.

  In the present embodiment, the radioactive waste solidification device SE solidifies the radioactive waste RW by a cement solidification method using cement as the solidification material SM. That is, the radioactive waste solidification device SE includes a cement solidification device. The radioactive waste solidification device SE may solidify the radioactive waste RW by at least one solidification method of asphalt solidification method using asphalt as the solidification material SM and plastic solidification method using plastic as the solidification material SM. .

  In this embodiment, the radioactive waste solidification device SE manufactures a solidified body obtained by solidifying the radioactive waste solidification device SE by an in-drum mixing method. The in-drum mixing method is a method in which the stirrer 5 is inserted into the disposal container DC, and the radioactive waste RW, the solidified material SM, and the water WT are stirred and solidified inside the disposal container DC.

  The transport device 6 transports the disposal container DC to a processing unit (processing station) PU in which the stirrer 5 is disposed. The first supply device 1 supplies the radioactive waste RW to the disposal container DC disposed in the processing unit PU. The second supply device 2 supplies the solidified material SM to the disposal container DC disposed in the processing unit PU. The 3rd supply apparatus 3 supplies water WT to the disposal container DC arrange | positioned at process part PU. The stirrer 5 stirs the radioactive waste RW, the solidified material SM, and the water WT supplied to the inside of the disposal container DC in the processing unit PU.

  The radioactive waste solidifying device SE has a cover member 8 called a splash guard arranged in the processing unit PU. The disposal container DC has an opening at the upper end. With the opening of the disposal container DC covered with the cover member 8, the radioactive waste RW, the solidified material SM, and the water WT are supplied into the disposal container DC through the opening of the disposal container DC. With the opening of the disposal container DC covered by the cover member 8, the radioactive waste RW, the solidified material SM, and the water WT supplied to the inside of the disposal container DC are stirred by the stirrer 5.

  The first supply device 1 supplies the radioactive waste RW to the disposal container DC of the processing unit PU. The in-drum mixing method mainly targets powdered radioactive waste RW or liquid radioactive waste RW. In this embodiment, the powdered radioactive waste RW is supplied to the disposal container DC of the processing unit PU. For example, powdered radioactive waste RW is generated from the radioactive concentrated waste liquid by a drying process or the like, and the radioactive waste RW is supplied to the disposal container DC. In the following description, the powdered radioactive waste RW is appropriately referred to as dry powder RW.

  The radioactive waste RW supplied to the disposal container DC of the processing unit PU is not limited to the dry powder RW. The radioactive waste RW supplied to the disposal container DC of the processing unit PU may be liquid or solid.

  The first supply device 1 includes a powder hopper 11 that contains a dry powder RW, a weighing device 12 that includes a powder weighing hopper that measures and delivers the dry powder RW from the powder hopper 11, and a powder hopper. 11 dry powder RW to the weighing device 12 and a first supply pipe 14 through which the dry powder RW supplied from the weighing device 12 to the disposal container DC passes. The conveying device 13 includes a powder hopper discharger 13A and a powder supply screw feeder 13B.

  The second supply device 2 supplies the solidified material SM to the disposal container DC of the processing unit PU. The second supply device 2 supplies cement as the solidifying material SM. The second supply device 2 includes a vacuum transfer device 21, a measurement device 22 including a measurement supply hopper that measures and sends the solidified material SM from the vacuum transfer device 21, and a solidification supplied from the measurement device 22 to the disposal container DC. A second supply pipe 24 through which the material SM passes and a valve mechanism 23 provided in the second supply pipe 24 are provided.

  The third supply device 3 supplies water WT to the disposal container DC of the processing unit PU. The third supply device 3 includes a measurement device 31 including a water measurement tank that measures and sends out the water WT from the water supply source, and a third supply pipe 34 through which the water WT supplied from the measurement device 31 to the disposal container DC passes. And a valve mechanism 33 provided in the third supply pipe 34.

  The exhaust device 4 discharges the gas GA in the disposal container DC of the processing unit PU. The exhaust device 4 includes a discharge pipe 44 through which the gas GA from the disposal container DC passes, and a filter device 41 disposed in the discharge pipe 44.

  The stirrer 5 stirs the dry powder RW, the solidified material SM, and the water WT supplied into the disposal container DC. The stirrer 5 includes a paddle 51 and an actuator 52 that drives the paddle 51. In the present embodiment, the agitator 5 is supported by the cover member 8.

  The transport device 6 transports the disposal container DC. The disposal container DC includes a drum can and has an opening at the upper end. The conveyance device 6 includes a conveyance carriage. The conveying device 6 carries the disposal container DC into the processing unit PU and carries out the disposal container DC from the processing unit PU. In the present embodiment, an exchange unit (exchange station) TU is provided outside the chamber apparatus CH.

  The exchange unit TU includes a transport conveyor 70 and a capping device 71 that attaches a cap member to the disposal container DC so as to cover the opening at the upper end of the disposal container DC. The disposal container DC is transported by the transport conveyor 70 of the exchange unit TU. The disposal container DC stands by in the exchange unit TU.

  The transfer device 6 can move between an exchange unit TU outside the chamber device CH and a processing unit PU inside the chamber device CH. In the present embodiment, a transfer port 9 is formed in a part of the chamber apparatus CH. The transfer device 6 can move between the outside and the inside of the chamber device CH via the transfer port 9. The radioactive waste solidifying device SE has a shielding door 10 that opens and closes the transport port 9. When the transport device 6 passes through the transport port 9, the shielding door 10 is activated and the transport port 9 is opened. When the transport device 6 does not pass through the transport port 9, the transport port 9 is closed by the shielding door 10.

  The transport device 6 includes a support base 61 that supports the disposal container DC, an elevating device 62 that can move the support base 61 up and down, and a traveling device 63 that can move while supporting the support base 61 and the elevating device 62. The traveling device 63 includes wheels and is capable of self-propelling.

  In the exchange unit TU, the disposal container DC before processing is placed on the support 61 of the transport device 6. The disposal container DC before processing includes a new (empty) disposal container DC. The transfer device 6 on which the disposal container DC before processing is placed moves from the exchange unit TU to the processing unit PU via the transfer port 9.

  In this embodiment, the disposal container DC before processing is transported to the replacement unit TU via the transport carriage 72 and the transfer conveyor 73.

  The transfer device 6 moved to the processing unit PU uses the lifting device 62 to raise the disposal container DC supported by the support base 61 so that the cover member 8 and the upper end portion of the disposal container DC are in contact with each other. Thereby, the opening of the upper end part of the disposal container DC is covered with the cover member 8.

  With the cover member 8 and the upper end of the disposal container DC in contact with each other, the dry powder RW, the solidified material SM, and the water are supplied from the first supply pipe 14, the second supply pipe 24, and the third supply pipe 34, respectively. Each of the WTs is supplied to the disposal container DC. The dry powder RW, the solidified material SM, and the water WT are supplied into the disposal container DC through the opening at the upper end of the disposal container DC. The paddle 51 of the agitator 5 is inserted into the disposal container DC through the opening at the upper end of the disposal container DC. By the operation of the actuator 52, the dry powder RW, the solidified material SM, and the water WT supplied to the inside of the disposal container DC are stirred by the paddle 51.

  When the stirring by the stirrer 5 ends, the transport device 6 lowers the support base 61 that supports the disposal container DC after the processing by the lifting device 62. The disposal container DC after the treatment includes a disposal container DC that contains the dried powder RW, the solidified material SM, and the water WT after stirring. The transport apparatus 6 on which the disposal container DC after processing is moved moves from the processing unit PU to the exchange unit TU.

  A cap member is attached by the capping device 71 to the disposal container DC that has been moved to the exchange unit TU. The treated disposal container DC to which the cap member is attached is sent to the transport carriage 72 via the transfer conveyor 73. The treated disposal container DC is transported to the next step by the transport carriage 72.

  The cleaning device 7 cleans the stirrer 5. When the stirring process by the stirrer 5 is not executed, the cleaning device 7 moves to the processing unit PU and cleans the stirrer 5. The stirring process by the stirrer 5 refers to a process in which the dry powder RW, the solidified material SM, and the water WT supplied into the disposal container DC in the processing unit PU are stirred by the stirrer 5.

  FIG. 2 is a cross-sectional view showing a part of the radioactive waste solidifying device SE according to the present embodiment. As shown in FIG. 2, the radioactive waste solidification device SE supplies a first supply pipe 14 for supplying the dry powder RW, a second supply pipe 24 for supplying the solidified material SM, and water WT. A third supply pipe 34 for discharging the gas GA and a discharge pipe 44 for discharging the gas GA.

  The first supply pipe 14 has a first supply passage 15 through which the dry powder RW supplied to the disposal container DC passes, and a first opening 16 provided at the lower end of the first supply passage 15. The second supply pipe 24 includes a second supply passage 25 through which the solidified material SM supplied to the disposal container DC passes, and a second opening 26 provided at the lower end of the second supply passage 25. The third supply pipe 34 has a third supply passage 35 through which the water WT supplied to the disposal container DC passes, and a third opening 36 provided at the lower end of the third supply passage 35. The discharge pipe 44 has a discharge passage 45 through which the gas GA from the disposal container DC passes, and an opening 46 provided at the lower end of the discharge passage 44.

  The radioactive waste solidifying device SE includes a cover member 8 that is disposed in the processing unit PU and covers the opening at the upper end of the disposal container DC. With the opening at the upper end of the disposal container DC covered with the cover member 8, the dry powder RW, the solidified material SM, and the water are placed inside the disposal container DC through the opening at the upper end of the disposal container DC. WT is supplied.

  The radioactive waste solidification device SE includes a stirrer 5 that is disposed in the processing unit PU and stirs the dry powder RW, the solidified material SM, and the water WT supplied to the disposal container DC. The stirrer 5 includes a paddle 51 at least partially disposed inside the disposal container DC, and an actuator 52 that drives the paddle 51. The actuator 52 includes a rotary motor and can rotate the paddle 51. The stirrer 5 is supported by the cover member 8. With the opening at the upper end of the disposal container DC covered with the cover member 8, the dry powder RW, the solidified material SM, and the water WT supplied to the inside of the disposal container DC are agitated by the agitator 5.

  In the present embodiment, the radioactive waste solidification device SE includes a valve 80 connected to the first opening 16. The valve 80 includes a casing 81, a valve body 82 disposed inside the casing 81, and a moving device 90 that moves the valve body 82.

  The casing 81 is a cylindrical member. A central axis AX of the casing 81 is inclined with respect to a horizontal plane (XY plane). The casing 81 is connected to the cylindrical portion 83 disposed around the central axis AX, and the first opening 16 provided at a part of the cylindrical portion 83 and at the lower end portion of the first supply passage 15 through which the dry powder RW passes. An inflow port 84 and an outflow port 85 provided at the lower end of the cylindrical portion 83.

  The valve body 82 is disposed inside the casing 81 (cylinder portion 83). The valve body 82 is movable in a direction parallel to the central axis AX. The valve body 82 can close the outflow port 85 by being disposed at the outflow port 85. The valve body 82 can open the outflow port 85 by moving so as to retreat from the outflow port 85. FIG. 2 shows a state where the outlet 85 is closed by the valve body 82.

  The disposal container DC is supported by a support base 61 of the transport device 6. In the processing unit PU, the position of the disposal container DC is adjusted by the transport device 6 so that the upper end portion of the disposal container DC and the cover member 8 are in contact with each other. In the present embodiment, the upper end portion of the disposal container DC and the cover member 8 are in contact so that the opening at the upper end portion of the disposal container DC is covered with the cover member 8. An opening is formed at the lower end of the cover member 8. The disposal container DC and the cover member 8 are connected so that the opening at the lower end of the cover member 8 and the opening at the upper end of the disposal container DC are connected.

  The dry powder RW that has passed through the first supply passage 15 is supplied into the cylindrical portion 83 through the first opening 16 and the inflow port 84. In the present embodiment, the outlet 85 is disposed in the cover member 8. The dry powder RW supplied from the inflow port 84 to the inside of the cylindrical portion 83 flows out from the outflow port 85. The dry powder RW that has flowed out from the outlet 85 is supplied into the disposal container DC through the opening at the lower end of the cover member 8 and the opening at the upper end of the disposal container DC.

  In the present embodiment, the second supply pipe 24 merges with the first supply pipe 14. The first supply pipe 14 has a receiving port 17 connected to the second opening 26 of the second supply pipe 24. The solidified material SM that has passed through the second supply passage 25 is supplied to the first supply passage 15 through the second opening 26 and the receiving port 17. The solidified material SM that has passed through the first supply passage 15 is supplied into the cylindrical portion 83 through the first opening 16 and the inflow port 84. The solidified material SM supplied from the inflow port 84 to the inside of the cylindrical portion 83 flows out from the outflow port 85. The solidified material SM that has flowed out from the outlet 85 is supplied to the inside of the disposal container DC through the opening at the lower end of the cover member 8 and the opening at the upper end of the disposal container DC.

  In the present embodiment, the third opening 36 of the third supply pipe 34 is disposed in the cover member 8. The water WT that has passed through the third supply passage 35 flows out from the third opening 36. The water WT flowing out from the third opening 36 is supplied to the inside of the disposal container DC through the opening at the lower end portion of the cover member 8 and the opening at the upper end portion of the disposal container DC.

  The paddle 51 of the agitator 5 is inserted into the disposal container DC through the opening at the upper end of the disposal container DC. By the operation of the actuator 52, the dry powder RW, the solidified material SM, and the water WT supplied to the inside of the disposal container DC are stirred by the stirrer 5.

  In the present embodiment, the opening 46 of the discharge pipe 44 is provided in the cover member 8. The gas GA inside the disposal container DC is discharged from the opening 46 and flows through the discharge passage 45.

  Next, an example of the operation of the valve element 82 will be described with reference to FIGS. The valve body 82 is moved by the moving device 90.

  The valve body 82 is movable to a first position PJ1 on the outer side (lower side) of one end portion (lower end portion) 84A of the inflow port 84 in a direction parallel to the central axis AX. The valve body 82 is movable to a second position PJ2 outside (upper side) of the other end (upper end) 84B of the inflow port 84 in a direction parallel to the central axis AX. The valve body 82 is movable between the first position PJ1 and the second position PJ2 by the moving device 90. The movable range of the valve body 82 is a range between the first position PJ1 and the second position PJ2. The movable distance of the valve body 82 is a distance between the first position PJ1 and the second position PJ2 in a direction parallel to the central axis AX.

  FIG. 3 is a diagram illustrating an example of a state in which the valve body 82 is disposed at the first position PJ1. As shown in FIG. 3, the moving device 90 is configured such that, at the first position PJ1, the outer surface of the valve body 82 and the inner surface of the casing 81 (cylinder portion 83) come into contact with each other and the outlet 85 is closed by the valve body 82. The valve body 82 is moved. Thereby, the outflow port 85 is closed by the valve body 82 arrange | positioned in the 1st position PJ1.

  FIG. 4 is a diagram illustrating an example of a state in which the valve body 82 is moving from the first position PJ1 to the second position PJ2. As shown in FIG. 4, when the moving device 90 moves from the first position PJ1 to the second position PJ2, the outer surface of the valve body 82 and the predetermined area 86 on the inner surface of the casing 81 below the inlet 84 are separated. Then, the valve body 82 is moved. Thus, a gap is formed between the lower end portion of the valve body 82 and the predetermined region 86 in the movement from the first position PJ1 to the second position PJ2. The predetermined area 86 is below the inflow port 84 and includes a part of the inner surface of the casing 81 facing the inflow port 84. The predetermined region 86 includes a bottom surface inside the casing 81.

  In the present embodiment, the moving device 90 changes the position of the valve body 82 around the predetermined axis BX orthogonal to the central axis AX in the movement from the first position PJ1 to the second position PJ2. The valve body 82 moves from the first position PJ1 to the second position PJ2 while rotating (inclining) about the predetermined axis BX. In the movement from the first position PJ1 to the second position PJ2, the valve body 82 is rotated about the predetermined axis BX so that the upper end portion of the valve body 82 is disposed closer to the second position PJ2 than the lower end portion of the valve body 82. Inclined to.

  FIG. 5 is a diagram illustrating an example of a state in which the valve body 82 is disposed at the second position PJ2. As shown in FIG. 5, the moving device 90 moves the valve body 82 so that the outer surface of the valve body 82 and the inner surface of the casing 81 (cylinder portion 83) are in contact with each other at the second position PJ2.

  FIG. 6 is a diagram illustrating an example of a state in which the valve body 82 is moving from the second position PJ2 to the first position PJ1. As shown in FIG. 6, the moving device 90 moves the valve body 82 so that the outer surface of the valve body 82 and a predetermined region 86 on the inner surface of the casing 81 are in contact with each other when moving from the second position PJ2 to the first position PJ1. Move. Thereby, the predetermined area 86 is rubbed against the lower end portion of the valve body 82 in the movement from the first position PJ1 to the second position PJ2.

  In the present embodiment, the moving device 90 fixes the position of the valve body 82 around the predetermined axis BX when moving from the second position PJ2 to the first position PJ1. Thereby, the valve body 82 moves to the first position PJ1 while the lower end portion of the valve body 82 and the predetermined region 86 on the inner surface of the casing 81 are in contact with each other.

  FIG. 7 is a diagram illustrating an example of the moving device 90 according to the present embodiment. The moving device 90 includes a first rod member 91 connected to the valve body 82, a first flange portion 92 and a second flange portion 93 provided on the first rod member 91, and at least a part of the first flange portion 92. A support member 94 disposed so as to surround the first rod member 91 between the first flange member 93 and the second flange portion 93; a second rod member 95 connected to each of the valve body 82 and the support member 94; and a central axis AX , An actuator 96 that can move the support member 94 in a parallel direction, a stopper member 97 disposed at the second position PJ2, a guide device 98 that guides the support member 94, a support member 94, and a first rod member 91. And an O-ring 99 disposed between the support member 94 and the first rod member 91.

  The first rod member 91 has a first distal end portion 91A and a first proximal end portion 91B. The first tip 91A is connected to the first portion 82A of the valve body 82. The first portion 82A of the valve body 82 is provided on the lower side (predetermined region 86 side) than the central axis AX. The first tip 91A of the first rod member 91 and the first portion 82A of the valve body 82 are connected to be rotatable relative to the first axis J1. The first axis J1 is orthogonal to the central axis AX.

  The first flange portion (first stopper portion) 92 is provided on the first rod member 91. The second flange portion (second stopper portion) 93 is provided on the first rod member 91 on the first base end portion 91 </ b> B side with respect to the first flange portion 92.

  The support member 94 is disposed so as to surround the first rod member 91 between the first flange portion 92 and the second flange portion 93. The dimension of the support member 94 in the direction parallel to the central axis AX is smaller than the distance between the first flange portion 92 and the second flange portion 93. The support member 94 and the first rod member 91 are relatively movable with respect to a direction parallel to the central axis AX.

  The second rod member 95 has a second distal end portion 95A and a second proximal end portion 95B. The second tip portion 95A is connected to the second portion 82B of the valve body 82. The second portion 82B of the valve body 82 is further away from the predetermined area 86 than the first portion 82A. The second portion 82B of the valve body 82 is provided above the central axis AX. The second tip portion 95A of the second rod member 95 and the second portion 82B of the valve body 82 are connected to be rotatable about the second axis J2. The second axis J2 is parallel to the first axis J1.

  The second base end portion 95B is connected to the support member 94. The second base end portion 95B of the second rod member 95 and the support member 94 are connected so as to be relatively rotatable about the third axis J3. The third axis J3 is parallel to the first axis J1 and the second axis J2.

  The actuator 96 includes a linear motion cylinder and can move the support member 94 in a direction parallel to the central axis AX. The guide device 98 guides the movement of the support member 94 in a direction parallel to the central axis AX.

  The stopper member 97 is provided so as to contact the third portion 82C of the valve body 82 at the second position PJ2. The third part 82C of the valve body 82 is a part farther from the predetermined area 86 than the second part 82B. That is, the third portion 82C is a portion closer to the upper end portion of the valve body 82 than the first portion 82A and the second portion 82B.

  FIG. 7 shows a state in which the valve body 82 is disposed at the first position PJ1. When the support member 94 is moved in the direction of the arrow C1 by the actuator 96 so as to be separated from the first position PJ1 and the second position PJ2, the lower end surface 94A of the support member 94 is separated from the first flange portion 92. The first rod member 91 and the support member 94 are relatively movable in a direction parallel to the central axis AX. When the support member 94 moves in the direction of the arrow C1, the second rod member 95 is moved together with the support member 94 to the arrow. Move in the C1 direction. Thereby, the valve body 82 is inclined (rotated) in one direction around the predetermined axis BX.

  When the support member 94 further moves in the direction of the arrow C <b> 1, the upper end surface 94 </ b> B of the support member 94 comes into contact with the second flange portion 93. When the support member 94 further moves in the arrow C1 direction in a state where the upper end surface 94B of the support member 94 and the second flange portion 93 are in contact with each other, the first rod member 91 moves in the arrow C1 direction together with the support member 94. . As a result, the valve body 82 moves from the first position PJ1 to the second position PJ2 while being inclined about the predetermined axis BX.

  When the support member 94 further moves in the direction of the arrow C1, at least a part of the valve body 82 including the third portion 82C reaches the second position PJ2. Of the first part 82A, the second part 82B, and the third part 82C, the third part 82C reaches the second position PJ2 first. A stopper member 97 is disposed in the second portion PJ2, and the stopper member 97 and the third portion 82C are in contact with each other. When the stopper member 97 and the third portion 82C are in contact with each other and the support member 94 is further moved in the direction of the arrow C1, the valve body 82 is inclined (rotated) in the reverse direction around the predetermined axis BX. Thereby, in the 2nd position PJ2, the outer surface of the valve body 82 and the inner surface of the casing 81 contact.

  When the support member 94 moves in the direction of the arrow C2 so as to approach the first position PJ1 and the second position PJ2 by the actuator 96, the upper end surface 94B of the support member 94 is separated from the second flange portion 93. Due to the movement of the support member 94 in the direction of the arrow C2, the second portion 82B of the valve element 82 moves in the direction of the arrow C2 while being pushed by the second rod member 95. Further, when the support member 94 moves in the arrow C2 direction, the lower end surface 94A of the support member 94 and the first flange portion 92 come into contact with each other. When the support member 94 moves in the direction of the arrow C <b> 2 in a state where the lower end surface 94 </ b> A of the support member 94 is in contact with the first flange portion 92, the first portion 82 </ b> A of the valve body 82 is being pushed by the first rod member 91. , Move in the direction of arrow C2. Thereby, the valve body 82 moves from the second position PJ2 to the first position PJ1 with the position around the predetermined axis BX being fixed.

  Next, an example of operation | movement of the radioactive waste solidification apparatus SE which concerns on this embodiment is demonstrated. As shown in FIG. 2, the cover member 8 and the disposal container DC are connected in the processing unit PU. Water WT is supplied from the third supply device 3 to the disposal container DC. The third supply device 3 supplies a predetermined amount of water WT measured by the measuring device 31 to the disposal container DC at a time. The water WT that has passed through the third supply passage 35 is supplied to the disposal container DC through the third opening 36.

  Also, with the valve body 82 disposed at the second position PJ2 (with the outlet 85 opened), the dry powder RW is supplied from the first supply device 1 to the disposal container DC, and the second supply device 2 The solidification material SM is supplied to the disposal container DC. The first supply device 1 supplies a predetermined amount of dry powder RW measured by the weighing device 12 to the disposal container DC at a time. The second supply device 2 supplies a predetermined amount of the solidified material SM measured by the measuring device 22 to the disposal container DC at a time. The dry powder RW that has passed through the first supply passage 15 passes through the inside of the inflow port 84 and the cylindrical portion 83, and then is supplied to the disposal container DC through the outflow port 85. The solidified material SM that has passed through the second supply passage 25 and the first supply passage 15 passes through the inside of the inflow port 84 and the cylindrical portion 83, and then is supplied to the disposal container DC through the outflow port 85.

  Note that the amount of dry powder RW supplied from the first supply device 1 to the disposal container DC at a time, and the amount of solidified material SM supplied from the second supply device 2 to the disposal container DC at a time, The sum of the amount of water WT supplied from the third supply device 3 to the disposal container DC at a time is smaller than the volume of the disposal container DC.

  After the dry powder RW, the solidified material SM, and the water WT are supplied to the disposal container DC, the dry powder RW, the solidified material SM, and the water WT inside the disposal container DC are stirred by the stirrer 5.

  Further, after the supply of the dry powder RW and the solidifying material SM to the disposal container DC is completed, the valve body 82 is disposed at the first position PJ1. As a result, the outlet 85 is closed by the valve element 82.

  By closing the outflow port 85 by the valve body 82, for example, in the stirring process using the stirrer 5, the dry powder RW and the solidified material SM are suppressed from spilling out from the outflow port 85. In the present embodiment, a predetermined amount of the dry powder RW and the solidified material SM that have been measured are supplied to the disposal container DC at a time. Even after the supply of the dry powder RW, there is a possibility that the dry powder RW remains in at least a part of the inside of the first supply passage 15 and the cylindrical portion 83. Even after the solidifying material SM is supplied, the solidifying material SM may remain in at least a part of the second supply passage 25, the first supply passage 15, and the cylindrical portion 83. In this embodiment, after supplying the dry powder RW and the solidified material SM, the outlet 85 is closed by the valve body 82, so that at least one of the remaining dry powder RW and solidified material SM is removed from the outlet 85. Spilling is suppressed.

  FIG. 8 is a diagram schematically illustrating an example of a state in which the dry powder RW and the solidified material SM are prevented from spilling from the outlet 85 by the valve body 82. As shown in FIG. 8, since the outlet 85 is closed by the valve body 82, the dry powder RW remains in at least part of the inside of the first supply passage 15 and the cylinder portion 83, or the second supply Even if the solidified material SM remains in at least a part of the passage 25, the first supply passage 15, and the cylindrical portion 83, the remaining dry powder RW and solidified material SM are blocked by the valve body 82. It is done. As a result, the dry powder RW and the solidified material SM are prevented from spilling from the outlet 85.

  The valve body 82 is in the first position until the supply of the dry powder RW and the solidification material SM to the next disposal container DC is started after the supply of the dry powder RW and the solidification material SM to the disposal container DC is completed. Continue to be placed in PJ1 (continue closing outlet 85).

  After the stirring by the stirrer 5 is completed, the treated disposal container DC is unloaded from the processing unit PU by the transport device 6. In addition, the disposal container DC before processing is carried into the processing unit PU by the transport device 6. The pre-processing disposal container DC conveyed to the processing unit PU is connected to the cover member 8.

  After the disposal container DC before the treatment and the cover member 8 are connected, the water WT is supplied from the third supply device 3 to the disposal container DC. Further, in order to supply the dry powder RW and the solidified material SM to the disposal container DC, the valve body 82 moves from the first position PJ1 to the second position PJ2.

  FIG. 9 is a diagram illustrating an example of a state in which the valve body 82 moves from the first position PJ1 to the second position PJ2. In the movement of the valve body 82 from the first position PJ1 to the second position PJ2, the valve body 82 moves so that the outer surface of the valve body 82 and the predetermined area 86 of the inner surface of the casing 81 are separated. Therefore, the dry powder RW and the solidified material SM blocked by the valve body 82 move toward the outlet 85 through the gap between the outer surface of the valve body 82 and the predetermined region 86 on the inner surface of the casing 81. It is supplied to the disposal container DC via the outlet 85. The outlet 85 is disposed below the predetermined area 86. The dry powder RW and the solidified material SM accumulated in the predetermined area 86 move toward the outlet 85 due to the gravitational action. In the present embodiment, in the movement from the first position PJ1 to the second position PJ2, the upper end portion of the valve body 82 is disposed closer to the second position PJ2 than the lower end portion of the valve body 82. The valve body 82 is inclined around the predetermined axis BX. As a result, the dry powder RW and the solidified material SM that have been dammed to the valve body 82 move toward the outflow port 85 from the gap between the outer surface of the valve body 82 and the predetermined region 86 on the inner surface of the casing 81. .

  The dry powder RW is supplied from the first supply device 1 to the disposal container DC in a state where the valve body 82 is moved from the first position PJ1 to the second position PJ2 and the outlet 85 is opened. The solidification material SM is supplied to the disposal container DC. After supplying the dry powder RW and the solidifying material SM, the valve body 82 moves from the second position PJ2 to the first position PJ1.

  FIG. 10 is a diagram illustrating an example of a state in which the valve body 82 moves from the second position PJ2 to the first position PJ1. The valve body 82 moves from the second position PJ2 to the first position PJ1 while bringing the outer surface of the valve body 82 into contact with the predetermined area 86 on the inner surface of the casing 81. Thereby, even if the dry powder RW and the solidified material SM remain in the predetermined region 86, the valve body 82 moves from the second position PJ2 to the first position PJ1, and is pushed out from the outlet 85 to the disposal container DC. Supplied.

  Thereafter, the same processing as described above is executed.

  As described above, according to the present embodiment, the valve body 82 that is movable between the first position PJ1 and the second position PJ2 is provided inside the casing 81, and the valve body 82 is provided at the first position PJ1. The outlet 85 is closed by being disposed in the position. As a result, the dry powder RW and the solidified material SM are prevented from spilling from the outlet 85. In addition, when moving from the first position PJ1 to the second position PJ2, the valve body 82 is inclined about the predetermined axis BX so that the outer surface of the valve body 82 and the predetermined area 86 of the inner surface of the casing 81 are separated from each other. The dry powder RW and the solidified material SM blocked by the valve body 82 are discharged from a gap formed between the outer surface of the valve body 82 and a predetermined region 86 on the inner surface of the casing 81, and the outflow port 85 is caused by gravity. Is supplied to the disposal container DC. Further, in the movement from the second position PJ2 to the first position PJ1, the valve body 82 moves so that the outer surface of the valve body 82 and the predetermined area 86 of the inner surface of the casing 81 are in contact with each other, so that the predetermined area 86 is dried. Even if the powder RW and the solidified material SM remain, the dry powder RW and the solidified material SM are scraped out by the valve body 82 and discharged from the outlet 85.

  Thus, in this embodiment, it is suppressed that the dry powder RW and the solidification material SM remain in the valve 80 for a long time. Therefore, for example, the remaining dry powder RW and solidified material SM are suppressed from adhering to the valve 80. Therefore, the valve 80 can continue to operate smoothly.

  Further, since the valve 80 can continue to operate smoothly, the outlet 85 is opened and closed smoothly. Therefore, the radioactive waste solidification device SE can smoothly supply the dry powder RW and the solidification material SM to the disposal container DC by opening the outlet 85 in the solidification process. The radioactive waste solidifying device SE starts supplying the dry powder RW and the solidification material SM to the next disposal container DC after the supply of the dry powder RW and the solidification material SM to the disposal container DC is completed. The outlet 85 is closed until the dry powder RW and the solidified material SM are spilled from the outlet 85. Therefore, the radioactive waste solidification device SE can smoothly perform the solidification process.

  Further, the moving device 90 moves the valve element 82 so that the outer surface of the valve element 82 and the inner surface of the casing 81 are in contact with each other at the second position PJ2. Thereby, it is suppressed that foreign materials such as the dry powder RW and the solidified material SM enter the moving device 90.

  In the present embodiment, the moving device 90 changes the position of the valve body 82 around the predetermined axis BX in the movement from the first position PJ1 to the second position PJ2, and from the second position PJ2 to the first position PJ1. Is moved, the position of the valve body 82 around the predetermined axis BX is fixed. Thereby, in the movement from the first position PJ1 to the second position PJ2, the dry powder RW and the solidified material SM blocked by the valve body 82 are formed between the outer surface of the valve body 82 and the predetermined region 86 on the inner surface of the casing 81. It is smoothly discharged from the gap. Further, even if the dry powder RW and the solidified material SM remain in the predetermined region 86, they are scraped out by the valve body 82 in the movement from the second position PJ2 to the first position PJ1.

  In the present embodiment, the moving device 90 has a link mechanism including a first rod member 91, a support member 94, and a second rod member 95. Thereby, the valve body 82 can be moved to an intended posture only by moving the support member 94 in a direction parallel to the central axis AX by the actuator 96.

  Moreover, in this embodiment, the 1st supply piping 14 has the receiving port 17 connected with the 2nd opening 26, and the 1st supply piping 14 and the 2nd supply piping 24 merge. Thereby, it is sufficient to provide one valve 80 for the dry powder RW and the solidified material SM.

  In the above-described embodiment, the first supply pipe 14 and the second supply pipe 24 merge, but do not need to merge. A first valve 80 connected to the first opening 16 of the first supply pipe 14 and a second valve 80 connected to the second opening 26 of the second supply pipe 24 may be provided. The same applies to the following embodiments.

Second Embodiment
A second embodiment will be described. In the following description, the same or equivalent components as those in the above-described embodiment are denoted by the same reference numerals, and the description thereof is simplified or omitted.

  A valve 800 according to the present embodiment will be described with reference to FIGS. 11 to 14. In the first embodiment described above, the example in which the central axis AX of the valve 80 is inclined with respect to the horizontal plane has been described. In the present embodiment, an example in which the central axis AX of the valve 800 is perpendicular to the horizontal plane will be described.

  The valve 800 includes a cylindrical portion 830 disposed around the central axis AX, and an inlet 340 provided in a part of the cylindrical portion 830 and connected to the opening 160 at the lower end of the supply passage 150 through which the dry powder RW passes. , A casing 810 having an outlet 850 provided at the lower end of the cylindrical portion 830, a valve body 820 disposed inside the casing 810, and one end of the inlet 340 with respect to a direction parallel to the central axis AX ( Movement that allows the valve body 820 to move between a first position PJ1 outside (lower side) of the lower end portion and a second position PJ2 outside (upper side) of the other end portion (upper end portion) of the inflow port 340. Device 900. In FIG. 11, the moving device 900 is illustrated in a simplified manner.

  As shown in FIG. 11, the moving device 900 moves the valve body 820 at the first position PJ1 so that the outer surface of the valve body 820 and the inner surface of the casing 810 come into contact with each other and the outlet 850 is closed by the valve body 820. move.

  As shown in FIG. 12, in the movement device 900, the movement from the first position PJ1 to the second position PJ2 separates the outer surface of the valve body 820 from the predetermined region 860 on the inner surface of the casing 810 below the inlet 340. Then, the valve body 820 is moved. In the movement from the first position PJ1 to the second position PJ2, the moving device 900 changes the position of the valve body 820 around the predetermined axis BX orthogonal to the central axis AX.

  As illustrated in FIG. 13, the moving device 900 moves the valve body 820 so that the outer surface of the valve body 820 and the inner surface of the casing 810 are in contact at the second position PJ2.

  As illustrated in FIG. 14, the moving device 900 moves the valve body 820 so that the outer surface of the valve body 820 and a predetermined region 860 on the inner surface of the casing 810 come into contact with each other when moving from the second position PJ2 to the first position PJ1. Move. The moving device 900 fixes the position of the valve body 820 around the predetermined axis BX in the movement from the second position PJ2 to the first position PJ1.

  As described above, also in this embodiment, after the supply of the dry powder RW to the disposal container DC is completed, the supply of the dry powder RW to the next disposal container DC is started. The closing valve body 820 prevents the dry powder RW from spilling. Further, the movement of the valve body 820 prevents the dry powder RW from staying in the valve 800 for a long period of time.

DESCRIPTION OF SYMBOLS 1 1st supply apparatus 2 2nd supply apparatus 3 3rd supply apparatus 4 Exhaust apparatus 5 Stirrer 6 Conveyor apparatus 7 Cleaning apparatus 8 Cover member 9 Conveyance port 11 Powder hopper 12 Weighing apparatus 13 Conveyor apparatus 13A Powder hopper discharge machine 13B Powder Body supply screw feeder 14 First supply pipe 15 First supply passage 16 First opening 17 Receiving port 21 Vacuum transfer device 22 Metering device 23 Valve mechanism 24 Second supply piping 25 Second supply passage 26 Second opening 31 Metering device 33 Valve Mechanism 34 Third supply piping 35 Third supply passage 36 Third opening 41 Filter device 44 Discharge piping 45 Discharge passage 46 Opening 51 Paddle 52 Actuator 61 Support base 62 Lifting device 63 Traveling device 70 Conveying conveyor 71 Capping device 72 Conveying cart 73 Transfer Conveyor 80 Valve 81 Casing 82 Valve body 82A First part 82B Second part 8 C third portion 83 cylindrical portion 84 inflow port 85 outflow port 86 predetermined area 90 moving device 91 first rod member 91A first distal end portion 91B first base end portion 92 first flange portion 93 second flange portion 94 support member 94A below End surface 94B Upper end surface 95 Second rod member 95A Second distal end portion 95B Second proximal end portion 96 Actuator 97 Stopper member 98 Guide device 99 O-ring 100 Bush AX Central axis BX Predetermined axis CH Chamber apparatus DC Disposal container GA Gas J1 First Axis J2 Second axis J3 Third axis PJ1 First position PJ2 Second position PU Processing unit (processing station)
RW Radioactive waste SE Radioactive waste solidification equipment SM Solidification material WT Water

Claims (6)

A cylindrical portion disposed around the central axis, an inlet connected to an opening at a lower end of a supply passage provided in a part of the cylindrical portion through which radioactive waste passes, and provided at a lower end of the cylindrical portion A casing having an outlet,
A valve body disposed inside the casing;
The valve body is movable between a first position outside the one end of the inlet and a second position outside the other end of the inlet with respect to a direction parallel to the central axis; the outflow port is closed by the valve body in contact with an outer surface and an inner surface of said casing of said valve body is in the first position, an outer surface of the valve body during the movement from the first position to the second position The outer surface of the valve body and the predetermined region are separated from each other so that a gap is continuously formed between the predetermined region of the inner surface of the casing below the inlet and the movement from the second position to the first position. A moving device that moves the valve body such that the outer surface of the valve body and the predetermined area of the inner surface of the casing are in contact with each other and the predetermined area continues to be rubbed by the outer surface of the valve body;
With a valve.   The valve according to claim 1, wherein the moving device moves the valve body so that an outer surface of the valve body and an inner surface of the casing are in contact with each other in the second position. The moving device maintains a state in which the position of the valve body around a predetermined axis orthogonal to the central axis is changed so that the gap is continuously formed during the movement from the first position to the second position. 2. The state in which the position of the valve body around the predetermined axis is fixed so that the predetermined area continues to be rubbed by the outer surface of the valve body during the movement from the second position to the first position. Or the valve of Claim 2. The mobile device is
A first end portion having a first distal end portion and a first base end portion, wherein the first distal end portion and the first portion of the valve body are connected to be rotatable relative to each other about a first axis orthogonal to the central axis. A rod member;
A first flange provided on the first rod member;
A second flange portion provided on the first rod member on the first base end side with respect to the first flange portion;
It arrange | positions so that the said 1st rod member may be enclosed between the said 1st flange part and the said 2nd flange part, and the dimension regarding the direction parallel to the said central axis is a said 1st flange part and a said 2nd flange part. A support member that is smaller than the distance and is movable relative to the first rod member in a direction parallel to the central axis;
The valve body has a second distal end portion and a second proximal end portion, and is centered about a second axis parallel to the first axis, and is farther from the predetermined region than the second distal end portion and the first portion. A second rod member connected to the second portion so as to be relatively rotatable, and connected to the second base end portion and the support member so as to be relatively rotatable around a third axis parallel to the second axis;
An actuator capable of moving the support member in a direction parallel to the central axis;
A stopper member provided so as to come into contact with the third portion of the valve body that is farther from the predetermined region than the second portion in the second position;
The valve according to any one of claims 1 to 3, comprising: A first supply pipe having a first supply passage through which radioactive waste supplied to a disposal container passes and a first opening provided at a lower end of the first supply passage;
A second supply passage having a second supply passage through which a solidified material supplied to the disposal container passes and a second opening provided at a lower end portion of the second supply passage;
A third supply passage having a third supply passage through which water supplied to the disposal container passes and a third opening provided at a lower end portion of the third supply passage;
A stirrer for stirring the radioactive waste, the solidified material, and the water supplied to the disposal container;
The valve according to any one of claims 1 to 4, which is connected to the first opening;
A radioactive waste solidifying device comprising:   The radioactive waste solidifying apparatus according to claim 5, wherein the first supply pipe has a receiving port connected to the second opening.

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